Dysphagia is difficulty swallowing that can affect any part of the swallowing pathway from the mouth to the stomach. It is a common complaint seen in ENT clinics. Causes include congenital issues, trauma, infections, inflammation, motility disorders, neurological problems, tumors, and other miscellaneous conditions. Evaluation involves history, examination, blood tests, imaging like barium swallow and endoscopy, and specialized tests like manometry and pH monitoring. Treatment depends on the underlying cause.